Samuel h



UNITED STATES-t PATENT OFFICE.-

sAMUnL n. noUNDs AND WALTER L. STRONG., or' sAnFnANoisoo OAL.

MACHINE'FOR CONCENTRATING THE DUST FROW DRES, MI'LLS, &c.

Specification forming part of Letters Patent No. 13,646, dated July 26, 1864..4

To all whom tm/ay concern;

Beit known that we, SAMUEL H. ROUN'DS 'and WALTER L. STRONG, ofthe city and coun- Yily of San Francisco and 'State .of California,

have invented anew and Improved Ore-Dust. Concentratin g Machine, vcalled Strong &

Roundss. Ore-Dust-'Concentrating Machine,`

for the purpose of 'concentrating the dust` 'arising from the-pulverizing or grinding of metallic ores; 'and we d'0 hereby declare that'.v

the following is a full, clear, andexact de scription of the same, together with its construction and operation, reference being had,"

to the annexed drawings, 'making a part'o'f this specification. f '1 f The nature of our invention consists in profA riding a machine for collecting and colleen-- traling the diist arising fromthe 'crushing' of4r metallic ores and 'preparing the saine for amai.- gamation ;ralso,rto prevent thedanger arising e from inhaling'the dustt by those engagedin and around quartz-mills,'which inhalation is' attended by .very serious', consequences, es-

-pe'cially when the orcfis'impregnated.with ar sonic or antin'iony.

To enable others 'skilled i'ii thcart' to Imake and use our invention,- we will proceed' to (lcsci-ite its' construction and operation.

We construct a rooin or chamber of wood of 1 any dimensions required, which is placed 1n' the stamp-room or outside of the building, as the case may be.l Atthc cxtreme left corner of this chamber is placed a 'condensing-ip.. paratus.y The ore dust is'drawn from'the batf l' -tery by means ofa suction-fan, and is forced into the chamber, where, bya current of a1r,it is carried into a steani-chest at the top of the condenser, when -it falls or is washeddown into the receptacle at the bottom of jthecondenser and is prepared i'oramalgamation.

In the drawings, ligure 1, A represents the concentrating-rooni, together with the front elevation of the condenser. 4B is the draft'- 'tubc through which the dust is forced by ,I means ofthe suction-ian into the chamber. C

is the top 'of the'condenser left open. D isav lfunnel-shaped tube, into which the ore-dust'is l legs.

perforated covering.v is' the funnel-shaped vtubeleading' to the steainchest F.1 E is a steam-pipe.. -G Gr G G is an opening from the' steam-chest "into the condenser. H 'Hare s up ply and wastepipes.- The-bottom on'esupp'lies the cylinder-jackets III I1. The top onelis the waste-pipe." LL L L are couplin'gs. v'KK KK' are hollow cylinders. pipes.

In Fig. 35H H are water-pipes.- A' II I I are cylinder'juckets. KK K'K are inside cylin-- ders. 'L L'L'L are couplings; N,N',-botton1 ofthe condenser; O O, legs; J, outlet. 'z Fig. 4 is a-topviewlof the condensingcy1 'inders. `(Shown in' detail )v Nj N, are pipes through which the ore and 'water is carried to thcbottomof the condenser. f f Fig. Sis va perspective .xiew of "the'con'dcnsing-cylinder. Ilg'H'a'I-e. exhaust and supply, pipes. 1 I l I are' outside cylinderscontaining water; J, 'outlet KK are cylinders 'gv MM, couplings; N N,bottoin of' condensing-cylinders; U O, legs:

' VVedo not claim a chamber or room for conf cei-itriiting ore-dust; neither do we vclaim the forcing ot' the dust into the chamber by means ofasuction-fan 5 but We claim- A machine for concentrating ore-dust with a sufficient condensing surface, for' the purpose and in the manner substantially asdes'cribed and setforth.

Fig. 2 isa ltop .view of the condenser witha M Mere ycon meeting- 

